Includers of this file apparently didn't know that <sys/queue.h>
was a prerequisite and include a semi-random collection headers
until one happened to include it.
- interrupt-driven printing now works (nlpt)
- Rearrangement of bus-related functions into ppb_base/ppbconf
- Addition of ieee1284 interface functions, preliminary parallel-port
PnP support
Submitted by: Nicolas Souchu <Nicolas.Souchu@prism.uvsq.fr>